# Hiller UH-12E

- Type: Aircraft model (FAA registry)
- Registry codes: 4360122, 4360137
- Manufacturer (registry): HILLER
- Model: UH-12E
- Aircraft type: Rotorcraft
- Category: Rotorcraft
- Engines: 1 · Reciprocating
- Seats: 4
- Weight class: Up to 12,499 lb
- Cruise speed: 72 mph
- Certification: Type certificated
- Data sheet: [TCDS 4H11](https://openairdocs.org/tcds/4H11) (OpenAirDocs)
- Holder: Siam Hiller Holdings Inc.
- Registered aircraft: 103
- Page: https://openairdocs.org/model/hiller-uh-12e

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2025-15-02](https://openairdocs.org/ad/2025-15-02): Main Rotor Mast/Swashplate · Siam Hiller Holdings UH-12E and UH-12E-L. Effective Sep 24, 2025
- [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023
- [AD 2015-20-51](https://openairdocs.org/ad/2015-20-51): Hiller UH-12, UH-12A, UH-12B and 6 more
- [AD 2000-24-21](https://openairdocs.org/ad/2000-24-21): Control System Linkage · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Jan 10, 2001
- [AD 97-20-15](https://openairdocs.org/ad/97-20-15): Outboard Tension-Torsion Bar Pin · Hiller UH-12A, UH-12B, UH-12C and 2 more. Effective Nov 12, 1997
- [AD 97-10-16](https://openairdocs.org/ad/97-10-16): Blade Spar Tube and Cuff Inspection · Allison 250-C20/250-C20B engine (Siam Hiller Holdings STC SH177WE or SH178WE). Effective Jun 27, 1997
- [AD 90-15-01](https://openairdocs.org/ad/90-15-01): Tail Rotor Blade Assemblies · Hiller UH-12L, UH-12L4, UH-12E and 1 more. Effective Mar 7, 1991
- [AD 86-22-04](https://openairdocs.org/ad/86-22-04): Main Rotor Blades · Hiller UH-12D, UH-12E and UH-12E-L with STC SH177WE or SH178WE. Effective Nov 3, 1986
- [AD 86-17-02](https://openairdocs.org/ad/86-17-02): Main Rotor Blade Fork · Hiller UH-12D, UH-12E and UH-12E-L with STC SH177WE or SH178WE. Effective Aug 22, 1986
- [AD 84-19-08](https://openairdocs.org/ad/84-19-08): Engine Mount · Hiller UH-12D, UH-12E and UH-12E-L with STC SH177WE or SH178WE. Effective Sep 20, 1984
- [AD 83-25-02](https://openairdocs.org/ad/83-25-02): Main Rotor Blade Doublers · Allison 250-C20/250-C20B engine (Siam Hiller Holdings STC SH177WE). Effective Dec 29, 1983
- [AD 82-16-07](https://openairdocs.org/ad/82-16-07): Torsional Coupling Assemblies · Hiller UH-12L, UH-12L4, UH-12E and 1 more. Effective Oct 15, 1982
- [AD 82-13-04 R1](https://openairdocs.org/ad/82-13-04-R1): Torsional Couplings · Hiller UH-12L, UH-12L4, UH-12E and 1 more. Effective Sep 13, 1982
- [AD 82-15-02](https://openairdocs.org/ad/82-15-02): Main And Tail Rotors · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Jul 16, 1982
- [AD 81-18-02](https://openairdocs.org/ad/81-18-02): Tail Rotor Skin Cracks · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Sep 10, 1981
- [AD 81-17-03](https://openairdocs.org/ad/81-17-03): Main Transmission · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Aug 24, 1981
- [AD 81-09-08](https://openairdocs.org/ad/81-09-08): Main Rotor Blade · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Jun 25, 1981
- [AD 81-04-01](https://openairdocs.org/ad/81-04-01): Rudder Cable Assembly · Hiller UH-12D, UH-12L and UH-12E. Effective Feb 9, 1981
- [AD 80-23-02](https://openairdocs.org/ad/80-23-02): Turbine Power Conversions · Allison 250-C20/250-C20B engine (Siam Hiller Holdings STC SH177WE or 2 others). Effective Nov 20, 1980
- [AD 80-19-02](https://openairdocs.org/ad/80-19-02): Turbine Power - Soloy Conversions · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Oct 11, 1980
- [AD 80-07-04](https://openairdocs.org/ad/80-07-04): Main Rotor Blade Anti-Node Bars · Hiller UH-12, UH-12D and UH-12E. Effective Mar 31, 1980
- [AD 79-03-07](https://openairdocs.org/ad/79-03-07): Main Rotor Tachometer Generator · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Feb 21, 1979
- [AD 78-23-07](https://openairdocs.org/ad/78-23-07): Finite Life Components Listed in AD · Hiller UH-12D and UH-12E. Effective Dec 14, 1978
- [AD 78-22-08](https://openairdocs.org/ad/78-22-08): Flight/Engine Control · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Nov 30, 1978
- [AD 78-22-02](https://openairdocs.org/ad/78-22-02): Rotor Blade Retention System · Hiller UH-12D and UH-12E. Effective Oct 27, 1978
- [AD 78-18-03](https://openairdocs.org/ad/78-18-03): Drive Shaft · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Oct 6, 1978
- [AD 77-24-03](https://openairdocs.org/ad/77-24-03): Fuel Control Valve · Hiller UH-12C, UH-12D, UH-12L and 3 more. Effective Jan 6, 1978
- [AD 75-10-01](https://openairdocs.org/ad/75-10-01): Rotor Drive System · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective May 8, 1975
- [AD 61-05-04](https://openairdocs.org/ad/61-05-04): Main Transmission · Hiller UH-12D and UH-12E. Effective Jun 4, 1974
- [AD 74-04-03](https://openairdocs.org/ad/74-04-03): Main Rotor Drag Struts · Hiller UH-12D and UH-12E. Effective Feb 18, 1974
- [AD 73-20-03](https://openairdocs.org/ad/73-20-03): Main Rotor Hub · Hiller UH-12, UH-12A, UH-12B and 4 more. Effective Oct 30, 1973
- [AD 71-25-08](https://openairdocs.org/ad/71-25-08): Inspect Main Rotor Blades · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Dec 14, 1971
- [AD 69-13-07](https://openairdocs.org/ad/69-13-07): Collective Yoke Support Brackets · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Apr 30, 1970
- [AD 69-08-08](https://openairdocs.org/ad/69-08-08): Tail Rotor Yoke · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Apr 23, 1969
- [AD 67-08-03](https://openairdocs.org/ad/67-08-03): Cyclic Control Bracket · Hiller UH-12D and UH-12E. Effective Mar 9, 1967
- [AD 66-22-04](https://openairdocs.org/ad/66-22-04): Mercury Clutches · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Sep 2, 1966
- [AD 64-11-02](https://openairdocs.org/ad/64-11-02): Tail Rotor Pinion Gears · Siam Hiller Holdings UH-12E and UH-12E-L. Effective May 16, 1964
- [AD 76-20-06](https://openairdocs.org/ad/76-20-06): Cable Freezing Control · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE
- [AD 63-21-03](https://openairdocs.org/ad/63-21-03): Main Rotor Blades · Hiller UH-12D and UH-12E
- [AD 62-06-03](https://openairdocs.org/ad/62-06-03): Transmission & Lubrication System Modification · Hiller UH-12D and UH-12E
- [AD 59-25-03](https://openairdocs.org/ad/59-25-03): Wobble Plate Screws · Hiller UH-12, UH-12A, UH-12B and 3 more
- [AD 59-05-05](https://openairdocs.org/ad/59-05-05): Cyclic Control Scissor Casting · Hiller UH-12, UH-12A, UH-12B and 3 more

Historical (superseded or no longer in force):

- [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021
- [AD 77-07-05 R1](https://openairdocs.org/ad/77-07-05-R1) (historical): Control Rotor Blade Spar Tube and Cuff · Hiller UH-12, UH-12A, UH-12B and 3 more. Effective Jun 20, 1977
- [AD 77-07-05](https://openairdocs.org/ad/77-07-05) (historical): Control Rotor Blade Spar Tube and Cuff · Hiller UH-12, UH-12A, UH-12B and 3 more. Effective Jun 20, 1977

## Registered aircraft (103, first 50)

- [N100LM](https://openairdocs.org/aircraft/N100LM): [Haddock Flying Service Inc](https://openairdocs.org/faa-owner/HADDOCK%20FLYING%20SERVICE%20INC), [Salters, SC](https://openairdocs.org/faa-place/SC/Salters), S/N 1583
- [N102BB](https://openairdocs.org/aircraft/N102BB): [Nester Randal K](https://openairdocs.org/faa-owner/NESTER%20RANDAL%20K), [Seguin, TX](https://openairdocs.org/faa-place/TX/Seguin), built 1959, S/N 1107
- [N104HH](https://openairdocs.org/aircraft/N104HH): [Haddock Flying Service Inc](https://openairdocs.org/faa-owner/HADDOCK%20FLYING%20SERVICE%20INC), [Salters, SC](https://openairdocs.org/faa-place/SC/Salters), built 1960, S/N 2062
- [N1151L](https://openairdocs.org/aircraft/N1151L): [Classic Helicopters LLC](https://openairdocs.org/faa-owner/CLASSIC%20HELICOPTERS%20LLC), [Choteau, MT](https://openairdocs.org/faa-place/MT/Choteau), built 1960, S/N 1233
- [N119NR](https://openairdocs.org/aircraft/N119NR): [Slikker Flying Service Inc](https://openairdocs.org/faa-owner/SLIKKER%20FLYING%20SERVICE%20INC), [Buttonwillow, CA](https://openairdocs.org/faa-place/CA/Buttonwillow), built 1966, S/N 1472
- [N129HA](https://openairdocs.org/aircraft/N129HA): [Hiller Aircraft Corp](https://openairdocs.org/faa-owner/HILLER%20AIRCRAFT%20CORP), [Firebaugh, CA](https://openairdocs.org/faa-place/CA/Firebaugh), built 1975, S/N HA3029
- [N12UH](https://openairdocs.org/aircraft/N12UH): [Jstream Lc](https://openairdocs.org/faa-owner/JSTREAM%20LC), [Sheridan, WY](https://openairdocs.org/faa-place/WY/Sheridan), built 1962, S/N 1395
- [N130HA](https://openairdocs.org/aircraft/N130HA): [C&C Helicopters Inc](https://openairdocs.org/faa-owner/C%26C%20HELICOPTERS%20INC), [Kuna, ID](https://openairdocs.org/faa-place/ID/Kuna), S/N HA3030
- [N132HA](https://openairdocs.org/aircraft/N132HA): [Sky Copters Inc](https://openairdocs.org/faa-owner/SKY%20COPTERS%20INC), [Westmoreland, KS](https://openairdocs.org/faa-place/KS/Westmoreland), built 1975, S/N HA3032
- [N133HA](https://openairdocs.org/aircraft/N133HA): [Hanson Leasing Inc](https://openairdocs.org/faa-owner/HANSON%20LEASING%20INC), [Bad Axe, MI](https://openairdocs.org/faa-place/MI/Bad%20Axe), built 1976, S/N HA3033
- [N133WH](https://openairdocs.org/aircraft/N133WH): [Four Creeks Aviation Inc](https://openairdocs.org/faa-owner/FOUR%20CREEKS%20AVIATION%20INC), [Visalia, CA](https://openairdocs.org/faa-place/CA/Visalia), built 1973, S/N 1788
- [N1349A](https://openairdocs.org/aircraft/N1349A): [Lyle Daniel](https://openairdocs.org/faa-owner/LYLE%20DANIEL), [Westmoreland, KS](https://openairdocs.org/faa-place/KS/Westmoreland), S/N 2035
- [N139HA](https://openairdocs.org/aircraft/N139HA): [Knutson Flying Service Inc](https://openairdocs.org/faa-owner/KNUTSON%20FLYING%20SERVICE%20INC), [Tioga, ND](https://openairdocs.org/faa-place/ND/Tioga), built 1976, S/N HA3039
- [N144HA](https://openairdocs.org/aircraft/N144HA): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1976, S/N HA3044
- [N14637](https://openairdocs.org/aircraft/N14637): [Fort Wolters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1993, S/N 1577
- [N146ET](https://openairdocs.org/aircraft/N146ET): [Four Creeks Aviation Inc](https://openairdocs.org/faa-owner/FOUR%20CREEKS%20AVIATION%20INC), [Visalia, CA](https://openairdocs.org/faa-place/CA/Visalia), built 1976, S/N HA3046
- [N14MQ](https://openairdocs.org/aircraft/N14MQ): [Fort W0lters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20W0LTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1961, S/N 1474
- [N1512E](https://openairdocs.org/aircraft/N1512E): [Fort Wolters Helicopters](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTERS), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1965, S/N 1792
- [N1523T](https://openairdocs.org/aircraft/N1523T): [Bartlett Robert E](https://openairdocs.org/faa-owner/BARTLETT%20ROBERT%20E), [Cleveland, TX](https://openairdocs.org/faa-place/TX/Cleveland), built 1964, S/N 1740
- [N16NR](https://openairdocs.org/aircraft/N16NR): [Paragon Helicopter Services LLC](https://openairdocs.org/faa-owner/PARAGON%20HELICOPTER%20SERVICES%20LLC), [Claremore, OK](https://openairdocs.org/faa-place/OK/Claremore), built 1964, S/N 1755
- [N173SJ](https://openairdocs.org/aircraft/N173SJ): [Anthony Ghidossi Chemical LLC](https://openairdocs.org/faa-owner/ANTHONY%20GHIDOSSI%20CHEMICAL%20LLC), [Marysville, WA](https://openairdocs.org/faa-place/WA/Marysville), built 1981, S/N 5170
- [N175HA](https://openairdocs.org/aircraft/N175HA): [Shearer John](https://openairdocs.org/faa-owner/SHEARER%20JOHN), [The Dalles, OR](https://openairdocs.org/faa-place/OR/The%20Dalles), built 1978, S/N HA3075
- [N180HA](https://openairdocs.org/aircraft/N180HA): [Ambrosini Helicopters Inc](https://openairdocs.org/faa-owner/AMBROSINI%20HELICOPTERS%20INC), [Fresno, CA](https://openairdocs.org/faa-place/CA/Fresno), built 1980, S/N HA3080
- [N196FT](https://openairdocs.org/aircraft/N196FT): [Continental Title Trust LLC Trustee](https://openairdocs.org/faa-owner/CONTINENTAL%20TITLE%20TRUST%20LLC%20TRUSTEE), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita), built 1962, S/N 1364
- [N2068V](https://openairdocs.org/aircraft/N2068V): [Fort Wolters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), S/N 5107
- [N2275M](https://openairdocs.org/aircraft/N2275M): [Borszich Claude C Jr](https://openairdocs.org/faa-owner/BORSZICH%20CLAUDE%20C%20JR), [Phoenix, AZ](https://openairdocs.org/faa-place/AZ/Phoenix), built 1961, S/N 1305
- [N22SP](https://openairdocs.org/aircraft/N22SP): [Paragon Helicopter Services LLC](https://openairdocs.org/faa-owner/PARAGON%20HELICOPTER%20SERVICES%20LLC), [Claremore, OK](https://openairdocs.org/faa-place/OK/Claremore), built 1959, S/N 1214
- [N233WH](https://openairdocs.org/aircraft/N233WH): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1979, S/N 2116
- [N236HA](https://openairdocs.org/aircraft/N236HA): [Endries Ryan A](https://openairdocs.org/faa-owner/ENDRIES%20RYAN%20A), [Milwaukee, WI](https://openairdocs.org/faa-place/WI/Milwaukee), built 1977, S/N HA3063
- [N2678Y](https://openairdocs.org/aircraft/N2678Y): [Northwest Helicopters I Inc](https://openairdocs.org/faa-owner/NORTHWEST%20HELICOPTERS%20I%20INC), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), built 1960, S/N 2048
- [N28908](https://openairdocs.org/aircraft/N28908): [Slikker Flying Service Inc](https://openairdocs.org/faa-owner/SLIKKER%20FLYING%20SERVICE%20INC), [Buttonwillow, CA](https://openairdocs.org/faa-place/CA/Buttonwillow), built 1962, S/N 1332
- [N2VU](https://openairdocs.org/aircraft/N2VU): [Upham Slade C](https://openairdocs.org/faa-owner/UPHAM%20SLADE%20C), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 1965, S/N 1726
- [N3324F](https://openairdocs.org/aircraft/N3324F): [Summit Sales & Leasing Inc](https://openairdocs.org/faa-owner/SUMMIT%20SALES%20%26%20LEASING%20INC), [Salem, VA](https://openairdocs.org/faa-place/VA/Salem), built 1964, S/N 1735
- [N3351F](https://openairdocs.org/aircraft/N3351F): [Carey James D](https://openairdocs.org/faa-owner/CAREY%20JAMES%20D), [Winterset, IA](https://openairdocs.org/faa-place/IA/Winterset), built 1960, S/N 1207
- [N3375T](https://openairdocs.org/aircraft/N3375T): [E L Automation Inc](https://openairdocs.org/faa-owner/E%20L%20AUTOMATION%20INC), [Bonners Ferry, ID](https://openairdocs.org/faa-place/ID/Bonners%20Ferry), S/N 5237
- [N34SD](https://openairdocs.org/aircraft/N34SD): [Fort Wolters Helicopters Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTERS%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1965, S/N 1618
- [N36670](https://openairdocs.org/aircraft/N36670): [S & S Landscape Supply Inc](https://openairdocs.org/faa-owner/S%20%26%20S%20LANDSCAPE%20SUPPLY%20INC), [Grand Junction, CO](https://openairdocs.org/faa-place/CO/Grand%20Junction), built 1960, S/N 1277
- [N3751Z](https://openairdocs.org/aircraft/N3751Z): [Hiller Aviation Inc](https://openairdocs.org/faa-owner/HILLER%20AVIATION%20INC), [Firebaugh, CA](https://openairdocs.org/faa-place/CA/Firebaugh), S/N 2202
- [N3829](https://openairdocs.org/aircraft/N3829): [Dunn Emet](https://openairdocs.org/faa-owner/DUNN%20EMET), [Coolidge, AZ](https://openairdocs.org/faa-place/AZ/Coolidge), S/N 1425
- [N3978Z](https://openairdocs.org/aircraft/N3978Z): [Fort Wolters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), S/N 2106
- [N40277](https://openairdocs.org/aircraft/N40277): [Northwest Helicopters I Inc](https://openairdocs.org/faa-owner/NORTHWEST%20HELICOPTERS%20I%20INC), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), built 1979, S/N 5087
- [N4027D](https://openairdocs.org/aircraft/N4027D): [Four Creeks Aviation](https://openairdocs.org/faa-owner/FOUR%20CREEKS%20AVIATION), [Visalia, CA](https://openairdocs.org/faa-place/CA/Visalia), S/N 5072
- [N40290](https://openairdocs.org/aircraft/N40290): [Haddock Flying Service Inc](https://openairdocs.org/faa-owner/HADDOCK%20FLYING%20SERVICE%20INC), [Salters, SC](https://openairdocs.org/faa-place/SC/Salters), built 1980, S/N HA3081
- [N4029S](https://openairdocs.org/aircraft/N4029S): [Slikker Flying Service Inc](https://openairdocs.org/faa-owner/SLIKKER%20FLYING%20SERVICE%20INC), [Buttonwillow, CA](https://openairdocs.org/faa-place/CA/Buttonwillow), built 1980, S/N 5129
- [N4032Y](https://openairdocs.org/aircraft/N4032Y): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1981, S/N 5180
- [N40346](https://openairdocs.org/aircraft/N40346): [Rutland Flying Service](https://openairdocs.org/faa-owner/RUTLAND%20FLYING%20SERVICE), [Ridge Spring, SC](https://openairdocs.org/faa-place/SC/Ridge%20Spring), built 1982, S/N 5192
- [N4035L](https://openairdocs.org/aircraft/N4035L): [Four Creeks Aviation Inc](https://openairdocs.org/faa-owner/FOUR%20CREEKS%20AVIATION%20INC), [Visalia, CA](https://openairdocs.org/faa-place/CA/Visalia), built 1982, S/N 5199
- [N4277X](https://openairdocs.org/aircraft/N4277X): [High Country Helicopter LLC](https://openairdocs.org/faa-owner/HIGH%20COUNTRY%20HELICOPTER%20LLC), [Blowing Rock, NC](https://openairdocs.org/faa-place/NC/Blowing%20Rock), built 1981, S/N 5161
- [N430NR](https://openairdocs.org/aircraft/N430NR): [Rutland Flying Service Inc](https://openairdocs.org/faa-owner/RUTLAND%20FLYING%20SERVICE%20INC), [Ridge Spring, SC](https://openairdocs.org/faa-place/SC/Ridge%20Spring), S/N 2074, Registration expired, pending cancellation
- [N440NR](https://openairdocs.org/aircraft/N440NR): [Magnum Aviation LLC](https://openairdocs.org/faa-owner/MAGNUM%20AVIATION%20LLC), [Goff, KS](https://openairdocs.org/faa-place/KS/Goff), built 1964, S/N 2275

All 103: https://openairdocs.org/model/hiller-uh-12e/aircraft.md

## NTSB investigations (415, newest 50)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CEN26LA175](https://openairdocs.org/ntsb/CEN26LA175), Apr 30, 2026: Hiller UH-12E (N22SP), Chickasha, OK, substantial damage, investigation ongoing
- [NTSB WPR25LA246](https://openairdocs.org/ntsb/WPR25LA246), Aug 11, 2025: Hiller UH-12E (N703WA), Fobes Hill, WA, substantial damage. Probable cause: The pilot’s abrupt maneuver to avoid a powerline during an aerial application flight, which resulted in the helicopter’s impact with terrain.
- [NTSB CEN25LA143](https://openairdocs.org/ntsb/CEN25LA143), Mar 25, 2025: Hiller UH12-ET (N6006K), Ruston, LA, substantial damage. Probable cause: The pilot’s improper fuel planning and fuel management, which resulted in a total loss of engine power due to fuel exhaustion and subsequent impact with terrain during an autorotation.
- [NTSB WPR24LA262](https://openairdocs.org/ntsb/WPR24LA262), Jul 24, 2024: Hiller UH-12E (N3375T), Bonners Ferry, ID, substantial damage. Probable cause: The pilot’s improper selection of a landing site, which resulted in a main rotor strike. Contributing to the accident was the pilot’s improper performance planning and altitude selection over water,…
- [NTSB WPR22LA245](https://openairdocs.org/ntsb/WPR22LA245), Jul 6, 2022: Hiller UH-12E (N130HA), Wenatchee, WA, destroyed. Probable cause: The pilot’s failure to maintain clearance from power lines during low-level operations in light rain conditions.
- [NTSB CEN22LA318](https://openairdocs.org/ntsb/CEN22LA318), Jul 6, 2022: Hiller UH12E (N64272), Becker, MN, substantial damage. Probable cause: The in-flight failure of the main rotor mast hub due to several undetected fatigue fractures.
- [NTSB ERA21LA386](https://openairdocs.org/ntsb/ERA21LA386), Sep 29, 2021: Hiller UH-12E (N430NR), Millen, GA, substantial damage. Probable cause: The improper reassembly of the tail rotor gearbox following maintenance, which resulted in fatigue failure of the input pinion gear shaft, and the subsequent loss of tail rotor drive.
- [NTSB WPR21LA354](https://openairdocs.org/ntsb/WPR21LA354), Sep 23, 2021: Hiller UH-12E (N5334V), Bovill, ID, substantial damage. Probable cause: A loss of helicopter control for undetermined reasons based on the available evidence for this accident.
- [NTSB CEN20LA073](https://openairdocs.org/ntsb/CEN20LA073), Feb 1, 2020: Hiller UH 12E (N7173S), Dinosaur, CO, substantial damage. Probable cause: Failure of a S4 compressor blade due to a fatigue crack that likely initiated at a corrosion pit. Contributing to the accident was maintenance personnel’s failure to detect the corrosion pits during…
- [NTSB WPR20LA007](https://openairdocs.org/ntsb/WPR20LA007), Oct 14, 2019: Hiller UH 12E (N131HA), Susanville, CA, substantial damage. Probable cause: A partial loss of engine power due to multiple overtemperature events and a hot start event, which resulted in thermally damaged internal components of the engine. Contributing to the accident was…
- [NTSB GAA18CA573](https://openairdocs.org/ntsb/GAA18CA573), Sep 20, 2018: Hiller UH 12E (N1349A), Frankfort, KS, substantial damage. Probable cause: The ground crewmember's improper grabbing of the hovering helicopter's skid during an external load hook-up, which resulted in the helicopter descending and the main rotors striking ground equipment.
- [NTSB WPR15LA168](https://openairdocs.org/ntsb/WPR15LA168), May 27, 2015: Hiller UH 12E (N138HA), Wasco, CA, substantial damage, 1 fatal. Probable cause: An in-flight impact with terrain for reasons that could not be determined based on available evidence.
- [NTSB WPR15LA138](https://openairdocs.org/ntsb/WPR15LA138), Mar 29, 2015: Hiller UH 12E (N130HA), Firebaugh, CA, substantial damage. Probable cause: A loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB ERA14LA405](https://openairdocs.org/ntsb/ERA14LA405), Aug 25, 2014: Hiller UH 12E (N4035A), Cape May Court House, NJ, substantial damage. Probable cause: The mechanic’s failure to detect excessive wear on the engine’s lateral snubber vibration mount during the latest annual inspection, which resulted in an in-flight engine failure and a subsequent…
- [NTSB ERA14LA361](https://openairdocs.org/ntsb/ERA14LA361), Jul 26, 2014: Hiller UH 12E (N107HA), Wadesboro, NC, substantial damage. Probable cause: A partial loss of engine power due to the failure of the No. 2 engine accessory gearbox bearing for reasons that could not be determined based on the available information.
- [NTSB WPR14LA062](https://openairdocs.org/ntsb/WPR14LA062), Dec 9, 2013: Hiller UH 12E (N36MV), Chowchilla, CA, substantial damage. Probable cause: The failure of the torsional drive coupling, which resulted in a loss of drive to the main rotor system during low-altitude flight.
- [NTSB WPR11LA267](https://openairdocs.org/ntsb/WPR11LA267), Jun 19, 2011: Hiller UH-12E (N138HA), Lost Hills, CA, substantial damage. Probable cause: The failure of the engine-driven fuel pump, resulting in the loss of all engine power and the pilot's failure to correctly execute an autorotational landing.
- [NTSB WPR11LA244](https://openairdocs.org/ntsb/WPR11LA244), Jun 1, 2011: Hiller UH-12E (N68012), Stockton, CA, substantial damage. Probable cause: The pilot's failure to maintain clearance from obstacles.
- [NTSB ERA11LA216](https://openairdocs.org/ntsb/ERA11LA216), Mar 25, 2011: Hiller UH-12E (N4033P), Culpeper, VA, substantial damage. Probable cause: Mechanical failure of the transmission for reasons that could not be determined because the transmission could not be torn down.
- [NTSB WPR11CA146](https://openairdocs.org/ntsb/WPR11CA146), Feb 26, 2011: Hiller UH-12E (N236HA), Colusa, CA, substantial damage. Probable cause: The pilot's failure to maintain an adequate airspeed and an inadvertent encounter with settling with power while flying downwind.
- [NTSB WPR10CA466](https://openairdocs.org/ntsb/WPR10CA466), Sep 21, 2010: Hiller UH-12E (N6053H), Mecca, CA, substantial damage. Probable cause: The pilot's failure to maintain clearance from an obstacle while maneuvering.
- [NTSB WPR10FA440](https://openairdocs.org/ntsb/WPR10FA440), Aug 31, 2010: Hiller UH 12E (N67264), Kamiah, ID, substantial damage, 3 fatal. Probable cause: In-flight impact of a passenger's metal clipboard with the helicopter’s tail rotor, which resulted in destruction of the tail rotor and subsequent loss of control of the helicopter. The original…
- [NTSB ERA10LA383](https://openairdocs.org/ntsb/ERA10LA383), Jul 29, 2010: Hiller UH-12E (N104HH), Holly Hill, SC, substantial damage. Probable cause: Maintenance personnel's improper inspection and cleaning of the fuel nozzle, which resulted in a total loss of engine power.
- [NTSB CEN10CA362](https://openairdocs.org/ntsb/CEN10CA362), Jun 25, 2010: Hiller UH-12E (N9754C), Grand Junction, CO, substantial damage. Probable cause: The total loss of engine power for undetermined reasons.
- [NTSB WPR10LA127](https://openairdocs.org/ntsb/WPR10LA127), Feb 2, 2010: Hiller UH-12E (N36MV), Los Banos, CA, substantial damage. Probable cause: A partial loss of engine power due to a failure of the throttle interconnect hardware, which resulted in a hard landing.
- [NTSB WPR10CA094](https://openairdocs.org/ntsb/WPR10CA094), Jan 1, 2010: Hiller UH-12E (N440NR), Tipton, CA, substantial damage. Probable cause: The pilot's failure to maintain clearance from terrain.
- [NTSB CEN09CA359](https://openairdocs.org/ntsb/CEN09CA359), Jun 11, 2009: Hiller UH-12E (N34SD), Stringtown, OK, substantial damage. Probable cause: The pilot's failure to maintain clearance from power lines. Contributing to the accident was the pilot's preoccupation with personal affairs.
- [NTSB WPR09LA028](https://openairdocs.org/ntsb/WPR09LA028), Oct 30, 2008: Hiller UH-12E (N61436), Powder  River, WY, substantial damage. Probable cause: A flight control system malfunction while the helicopter was maneuvering at low altitude due to the failure/separation of the rotor blade control tube.
- [NTSB NYC08LA318](https://openairdocs.org/ntsb/NYC08LA318), Sep 16, 2008: Hiller UH-12E (N3324F), Naruna, VA, substantial damage. Probable cause: The fatigue failure of a main rotor blade drag strut.
- [NTSB CHI08CA252](https://openairdocs.org/ntsb/CHI08CA252), Aug 15, 2008: Hiller UH-12E (N945HA), Cokato, MN, substantial damage. Probable cause: The pilot did not visually identify and maintain clearance with the power lines, and the pilot's inability to maintain control of the helicopter once it contacted the power lines. Factors associated…
- [NTSB DFW08LA100](https://openairdocs.org/ntsb/DFW08LA100), Apr 7, 2008: Hiller UH-12E (N34SD), Quinton, OK, substantial damage. Probable cause: An undetermined mechanical malfuction associated with the tail rotor drive system which led to a loss of control.
- [NTSB DEN08LA071](https://openairdocs.org/ntsb/DEN08LA071), Apr 4, 2008: Hiller UH-12E (N40289), La Porte, TX, substantial damage. Probable cause: The loss of tail rotor effectiveness. Contributing factors were the sudden windshift to a tailwind, and the pilot initiating a hovering turn in ground effect.
- [NTSB SEA08LA038](https://openairdocs.org/ntsb/SEA08LA038), Nov 24, 2007: Hiller UH-12E (N104EA), Yuma, AZ, substantial damage. Probable cause: Fatigue fracture of the control rotor blade spar and failure of maintenance personnel to follow maintenance directives.
- [NTSB ANC07LA062](https://openairdocs.org/ntsb/ANC07LA062), Jul 10, 2007: Hiller UH-12E (N146ET), Skwentna, AK, substantial damage. Probable cause: The pilot's failure to maintain clearance from a glacier, which resulted in a tail rotor strike during landing, and damage to the helicopter during an emergency descent/landing on rough/uneven…
- [NTSB DFW06CA013](https://openairdocs.org/ntsb/DFW06CA013), Oct 23, 2005: Hiller UH-12E (N909BC), Pasadena, TX, substantial damage. Probable cause: The pilot's inadequate fuel management, which resulted in fuel exhaustion and a loss of engine power. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB LAX05CA313](https://openairdocs.org/ntsb/LAX05CA313), Sep 22, 2005: Hiller UH 12-E (N141HA), Five Points, CA, substantial damage. Probable cause: The pilot's failure to refuel the helicopter, which resulted in fuel exhaustion.
- [NTSB DFW05CA208](https://openairdocs.org/ntsb/DFW05CA208), Aug 10, 2005: Hiller UH-12E (N535HA), Hampton, AR, substantial damage. Probable cause: A loss of engine power due to fuel exhaustion as a result of the pilot's failure to refuel. A factor was unsuitable terrain to complete a successful autorotation.
- [NTSB SEA05CA104](https://openairdocs.org/ntsb/SEA05CA104), May 23, 2005: Hiller UH-12E (N3030H), Estacada, OR, substantial damage. Probable cause: The failure of the pilot to maintain landing skid clearance during hover taxi, which resulted in a dynamic rollover. A factor was the gusty wind condition.
- [NTSB SEA04LA073](https://openairdocs.org/ntsb/SEA04LA073), Apr 26, 2004: Hiller UH-12E (N9785C), Haines, OR, substantial damage. Probable cause: A momentary partial loss of power for undetermined reason(s) and the pilot's failure to maintain adequate RPM during his autorotation landing.
- [NTSB LAX03CA284](https://openairdocs.org/ntsb/LAX03CA284), Sep 9, 2003: Hiller UH12E (N9792C), Kekaha, HI, substantial damage. Probable cause: the pilot's failure to maintain clearance with the wires due to an inadequate visual lookout.
- [NTSB CHI03LA185](https://openairdocs.org/ntsb/CHI03LA185), Jun 27, 2003: Hiller UH-12E (N62417), Elk Mound, WI, destroyed. Probable cause: The pilot's failure to maintain clearance from the terrain. Factors contributing to the accident were the whirlwind, the turbulence, and the helicopter's low altitude.
- [NTSB DEN03LA092](https://openairdocs.org/ntsb/DEN03LA092), May 30, 2003: Hiller UH-12E (N508SQ), Cheyenne, WY, substantial damage. Probable cause: the pilot's failure to maintain aircraft control. A contributing to the accident was the sudden tailwind encountered.
- [NTSB SEA02LA073](https://openairdocs.org/ntsb/SEA02LA073), Apr 22, 2002: Hiller UH-12E (N3004T), Goshen, OR, substantial damage. Probable cause: The failure of company maintenance personnel to identify and replace/repair the degraded exhaust stack. Contributing factors were the mis-rigged carburetor heat control and the pilot's failure to…
- [NTSB ATL02LA044](https://openairdocs.org/ntsb/ATL02LA044), Feb 11, 2002: Hiller UH12E (N103HA), Miami, FL, substantial damage. Probable cause: Fatigue cracking in the main rotor hub that resulted in the separation of the main rotor system. A factor was corrosive deposits on the exposed portion of the plate set pin.
- [NTSB CHI01LA238](https://openairdocs.org/ntsb/CHI01LA238), Jul 25, 2001: Hiller UH-12E (N67067), Hastings, NE, substantial damage. Probable cause: Aircraft control not being maintained by the pilot which resulted in the encountered settling with power flight condition during the initial climb. Factors to the accident were the reported variable…
- [NTSB LAX01LA245](https://openairdocs.org/ntsb/LAX01LA245), Jul 13, 2001: Hiller UH-12E (N9281P), Blythe, CA, substantial damage. Probable cause: The selection by the pilot of an unsuitable precautionary landing site on soft, uneven terrain, which resulted in a rollover.
- [NTSB MIA01LA055](https://openairdocs.org/ntsb/MIA01LA055), Jan 5, 2001: Hiller UH-12E (N112EC), Cleveland, TN, destroyed. Probable cause: The PIC's failure to follow safe operating procedures for the maintenance of the rotorcraft's external aerial application equipment, resulting in inadvertent activation of collective as he egressed…
- [NTSB ATL00LA043](https://openairdocs.org/ntsb/ATL00LA043), Apr 20, 2000: Hiller UH-12ET (N9762C), Stonesboro, SC, substantial damage. Probable cause: The pilot's improper inflight decision not to refuel which resulted in fuel exhaustion and a total loss of engine power.
- [NTSB LAX00LA077](https://openairdocs.org/ntsb/LAX00LA077), Jan 26, 2000: Hiller UH-12E (N68024), Five Points, CA, substantial damage. Probable cause: The pilot's inadequate clearance while maneuvering beneath a telephone line.
- [NTSB SEA00TA013](https://openairdocs.org/ntsb/SEA00TA013), Nov 2, 1999: Hiller UH-12E (N5388V), Stites, ID, substantial damage. Probable cause: Inadequate inspection of the control rotor cuff by a company mechanic and subsequent fatigue fracture of the cuff, resulting in an inflight separation of the control rotor blade. Factors contributing…

All 415: https://openairdocs.org/model/hiller-uh-12e/ntsb.md

## FAA accident and incident reports (404, newest 50)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20260430003599A](https://openairdocs.org/incident/20260430003599A), Apr 30, 2026: Hiller UH-12E (N22SP), Chickasha, OK, Substantial damage. On April 30, 2026, at approximately 1730 a [privacy data omitted] helicopter was traversing between fields where it was spraying agricultural products, when…
- [Accident 20250811010179A](https://openairdocs.org/incident/20250811010179A), Aug 11, 2025: Hiller UH-12E (N703WA), Snohomish, WA, Substantial damage. Pilot stated he crossed underneath powerlines to continue spraying product then made a right sharp turn. The pilot stated that he was a little low and then met…
- [Accident 20240724009899A](https://openairdocs.org/incident/20240724009899A), Jul 24, 2024: Hiller UH-12E (N3375T), Big Fisher Lake, ID, Substantial damage. Helicopter was flown from bonners ferry, ID to Big Fisher Lake, ID. After arrival while hovering over water, pilot was unable to maintain hover. Moving over…
- [Accident 20220706012029A](https://openairdocs.org/incident/20220706012029A), Jul 6, 2022: Hiller UH-12E (N130HA), Wenatchee, WA, Destroyed. Pilot was drying cherries when he made a turn and hit power lines that went through the field. After hitting the power lines the main rotor separated from the…
- [Accident 20220706007819A](https://openairdocs.org/incident/20220706007819A), Jul 6, 2022: Hiller UH-12E (N64272), Becker, MN, Substantial damage. 2022-07-06 N64272 crashed in potato field while performing 137 agricultural application. PIC had been spraying a potato field in N64272 for approximately 5…
- [Accident 20210929014589A](https://openairdocs.org/incident/20210929014589A), Sep 29, 2021: Hiller UH-12E (N430NR), Garfield, GA, Destroyed. On September 29, 2021, at approximately 1015 eastern time, a 1961 Hiller UH-12E helicopter, with registration N430NR was destroyed upon impact with terrain…
- [Accident 20210923021959A](https://openairdocs.org/incident/20210923021959A), Sep 23, 2021: Hiller UH-12E (N5334V), Bovill, ID, Substantial damage. The helicopter, operating part 137, was approximately 50' AGL and slowly approaching the loading zone to reload. The pilot felt a jolt then experienced a…
- [Accident 20200201002999A](https://openairdocs.org/incident/20200201002999A), Feb 1, 2020: Hiller UH-12E (N7173S), Dinosaur, CO, Substantial damage. Pilot and two passengers departed from the pilot?s home heading to one of the passenger?s ranch. Enroute and at about 700 ft AGL, the pilot heard a loud…
- [Accident 20191013019549A](https://openairdocs.org/incident/20191013019549A), Oct 13, 2019: Hiller UH-12E (N131HA), Susanville, CA, Substantial damage. While finishing a spray application in steep logging terrain the pilot heard 2 loud compressor stalls with a slight yaw to left. Engine power was decreased and…
- [Accident 20180920013899A](https://openairdocs.org/incident/20180920013899A), Sep 20, 2018: Hiller UH-12E (N1349A), Frankfort, KS, Substantial damage. September 20, 2018 12:30 zulu ? Clear sky with 20-25 mph wind. First flight of the day, the pilot lifted the aircraft off and clear of the helicopter transport…
- [Accident 20150527011319A](https://openairdocs.org/incident/20150527011319A), May 27, 2015: Hiller UH-12E (N138HA), Wasco, CA, Destroyed, 1 fatal. N138HA Hiller UH-12E rotorcraft crashed then caught fire during an aerial application operation, the 1 person on board sustained fatal injuries, near Wasco, CA…
- [Accident 20150328004619A](https://openairdocs.org/incident/20150328004619A), Mar 28, 2015: Hiller UH-12E (N130HA), Firebaugh, CA, Substantial damage. While conducting an aerial application on young almond trees the helicopter engine quit and the pilot redirected the helicopter into the wind and made an…
- [Accident 20140825018029A](https://openairdocs.org/incident/20140825018029A), Aug 25, 2014: Hiller UH-12E (N4035A), Cape May County, NJ, Substantial damage. Aircraft was intiating a cruise climb climbing through 300 feet heading in a westerley direction at 50KTS when a loud bang accompanied by a vibration with a…
- [Accident 20140726018219A](https://openairdocs.org/incident/20140726018219A), Jul 26, 2014: Hiller UH-12E (N107HA), Wadesboro, NC, Substantial damage. On 7/26/2014 at 1545 local EDT, Hiller UH-12-E, N4107HA, sn: HA3007, registered to summit helicopters inc., experienced an engine (250-C20B, sn: CAE833000)…
- [Accident 20131209023649A](https://openairdocs.org/incident/20131209023649A), Dec 9, 2013: Hiller UH-12E (N36MV), Madera, CA, Substantial damage. The aircraft was performing agricultural flight operations, frost control, when the torsional coupling failed. Being at low altitude, the RPM went quickly…
- [Accident 20110619012689A](https://openairdocs.org/incident/20110619012689A), Jun 19, 2011: Hiller UH-12E (N138HA), Lost Hills, CA, Substantial damage. Pilot reported sudden and complete loss of engine power during repositioning turn after a spray run. The aircraft landed hard and rolled over.
- [Accident 20110601010959A](https://openairdocs.org/incident/20110601010959A), Jun 1, 2011: Hiller UH-12E (N68012), Stockton, CA, Destroyed. Pilot was performing low level agricultural operations drying cherry trees. Heavy vibration occurred and pilot initiated a precautionary landing when the…
- [Accident 20110325004879A](https://openairdocs.org/incident/20110325004879A), Mar 25, 2011: Hiller UH-12E (N4033P), Culpepper, VA, Substantial damage. Upon arriving at the job site to begin aerial application the pilot noted an uncommanded increase in engine RPM accompanied by a loss of lift. He reduced…
- [Accident 20110226002689A](https://openairdocs.org/incident/20110226002689A), Feb 26, 2011: Hiller UH-12E (N236HA), Colusa, CA, Substantial damage. During a manuever in an almond orchard, the pilot flew the aircraft from a cross wind direction to a downwind direction during a manuever in an almond orchard,…
- [Accident 20100921045879A](https://openairdocs.org/incident/20100921045879A), Sep 21, 2010: Hiller UH-12E (N6053H), Mecca, CA, Substantial damage. According to the pilot this is the synopses of the accident. The pilot was crop dusting under the wires and upon the turn of his last path his main rotor blade…
- [Accident 20100831042429A](https://openairdocs.org/incident/20100831042429A), Aug 31, 2010: Hiller UH-12E (N67264), Kamiah, ID, Substantial damage, 3 fatal. Flight was for the state of Idaho fish and game to count fish on the selway river. Pilot notified statecom flight following he was landing at Kamiah, ID with…
- [Accident 20100729042709A](https://openairdocs.org/incident/20100729042709A), Jul 29, 2010: Hiller UH-12E (N104HH), Holly Hill, SC, Substantial damage. On July 29, 2010, at approximately 0930 eastern standard time, a Hiller UH-12E helicopter, N104HH, registered to haddock flying, inc., operating as a 14 CFR…
- [Accident 20100624036009A](https://openairdocs.org/incident/20100624036009A), Jun 24, 2010: Hiller UH-12E (N9754C), Grand Junction, CO, Substantial damage. After completing a new annual inspection the aircraft was taken for a short flight. While hover taxiing the helicopter lost power and veered toward a light…
- [Accident 20100202026659A](https://openairdocs.org/incident/20100202026659A), Feb 2, 2010: Hiller UH-12E (N36MV), Los Banos, CA, Substantial damage. When returning to the load truck after completion of an aerial application the pilot noticed that his throttle did not respond. The pilot was at an altitude of…
- [Accident 20100101025799A](https://openairdocs.org/incident/20100101025799A), Jan 1, 2010: Hiller UH-12E (N440NR), Tipton, CA, Substantial damage. Weather was overcast for the first part of the flight. When the sun came out during a swath run, the pilot propped up the collective with his knee and reached…
- [Accident 20090611010329A](https://openairdocs.org/incident/20090611010329A), Jun 11, 2009: Hiller UH12E (N34SD), Stringtown, OK, Substantial damage. A mechanic at the repair facility the wreckage was taken to, advises he was told, that on the first load of the day the helicopter hopper tanks were loaded…
- [Accident 20081030851229A](https://openairdocs.org/incident/20081030851229A), Oct 30, 2008: Hiller UH12E (N61436), Power River, WY, Destroyed. (-23) Control rotor blade assy shaft broke at outer attach bolt hole.
- [Accident 20080916849359A](https://openairdocs.org/incident/20080916849359A), Sep 16, 2008: Hiller UH12E (N3324F), Roanoke, VA, Substantial damage. (-23) According to the pilot on September 16, 2008 at approximately 18:43 hours helicopter experienced a violent horizontal shake or wobble. The helicopter…
- [Accident 20080815850449A](https://openairdocs.org/incident/20080815850449A), Aug 15, 2008: Hiller UH12E (N945HA), Jacksonville, FL, Destroyed. (-23) The helicopter, a Hiller UH-12E was conducting an aerial spraying application to a corn field. During the first pass over the corn field the helicopter…
- [Incident 20080807847179I](https://openairdocs.org/incident/20080807847179I), Aug 7, 2008: Hiller UH12E (N7411N), Viroqua, WI, Minor damage. (-23) On August 7, 2008, at 1604 local, N7411N, a Hiller UH-12/E flown by [privacy data omitted] (certificated #[privacy data omitted]) just completed spraying…
- [Accident 20080407833479A](https://openairdocs.org/incident/20080407833479A), Apr 7, 2008: Hiller UH12E (N34SD), Quinton, OK, Substantial damage. (-23) On April 7, 2008, the pilot of N34SD was returning to a loading area in his helicopter, a Hiller 12E, N34SD after an aerial application in a field near…
- [Accident 20080404832169A](https://openairdocs.org/incident/20080404832169A), Apr 4, 2008: Hiller UH12E (N40289), La Porte, TX, Substantial damage. (-23) Aircraft control was lost while doing hover practice in the grassy area at the approach end of runway 05 at the La Porte (T41) airport. Pilot stated he…
- [Accident 20071123827409A](https://openairdocs.org/incident/20071123827409A), Nov 23, 2007: Hiller UH12E (N104EA), Somerton, AZ, Substantial damage. (-23) On November 23, 2007, about 1930 MST, a Hiller UH-12E helicopter, N104EA, sustained substantial damage during a forced landing following an in-flight…
- [Accident 20070709014499A](https://openairdocs.org/incident/20070709014499A), Jul 9, 2007: Hiller UH12E (N146ET), Mcgrath, AK, Substantial damage. (-23) The rotorcraft was hovering with one skid on the surface of a knife edge shaped ridge. A gust of wind hit the rotorcraft causing the tailrotor to strike…
- [Incident 20070506020799I](https://openairdocs.org/incident/20070506020799I), May 6, 2007: Hiller UH12E (N3416F), Corning, KS, Minor damage. (-23) Received an anonymous letter indicating that the pilot's [privacy data omitted] nemaha valley aerial had struck a powerline near Corning, KS. Contacted…
- [Incident 20060901017779I](https://openairdocs.org/incident/20060901017779I), Sep 1, 2006: Hiller UH12E (N8402D), Luxora, AR, Minor damage. (-23) Pilot stated he was working ag operations for about 20 minutes on this flight. He made a normal field entry and was established on his spray run. The…
- [Incident 20060201000739I](https://openairdocs.org/incident/20060201000739I), Feb 1, 2006: Hiller UH12E (N71NW), Forks, WA, Minor damage. (-23) Pilot stated during external load operation, aircraft settled with power. After recovery, aircraft yawed to the left and struck the top of a small tree,…
- [Accident 20051022027559A](https://openairdocs.org/incident/20051022027559A), Oct 22, 2005: Hiller UH12E (N909BC), Pasadena, TX, Substantial damage. (-23) Pilot stated that the aircraft lost power. As the aircraft was in autorotation it hit a petroleum coke mound at about the 200 foot mark and rolled down…
- [Accident 20050921020819A](https://openairdocs.org/incident/20050921020819A), Sep 21, 2005: Hiller UH12E (N141HA), Five Points, CA, Substantial damage. (-23) On 9/21/2005, at approximately 2200 hours PDT, Hiller UH-12E helicopter, N141HA, crashed approximately 12.5 miles west of Five Points, CA. N141HA,…
- [Accident 20050810018569A](https://openairdocs.org/incident/20050810018569A), Aug 10, 2005: Hiller UH12E (N535HA), Hampton, AR, Substantial damage. (-23) On August 10, 2005, at approximately 1110 central standard time, a UH-12-E Hiller single engine helicopter, registration number N535HA operated by summit…
- [Accident 20050523011759A](https://openairdocs.org/incident/20050523011759A), May 23, 2005: Hiller UH12E (N3030H), Estacada, OR, Substantial damage. (-23) During takeoff from a trailer, prior to commencing aerial application operations, the aircraft encountered a gust of wind from the left causing an…
- [Accident 20040426009029A](https://openairdocs.org/incident/20040426009029A), Apr 26, 2004: Hiller UH12E (N9785C), Haines, OR, Substantial damage. (-23) While returning to his main base following an aerial application job, at approximately 100 feet or less AGL the pilot heard a loud bang in the helicopter…
- [Accident 20030909036289A](https://openairdocs.org/incident/20030909036289A), Sep 9, 2003: Hiller UH12E (N9792C), Kekaha, HI, Destroyed. (-23) This was a part 137 aerial application operation on the island of kauai, vicinity of barking sands, pmfr. The PIC was not aware wires were in the…
- [Accident 20030627013009A](https://openairdocs.org/incident/20030627013009A), Jun 27, 2003: Hiller UH12E (N62417), Elk Mound, WI, Destroyed. (-23) While applying fungicide to a field of potatoes, the helicopter encountered a whirlwind, causing the pilot to lose control and contact the crop with the…
- [Accident 20030530010949A](https://openairdocs.org/incident/20030530010949A), May 30, 2003: Hiller UH12E (N508SQ), Cheyenne, WY, Substantial damage. (-23) Pilot was spraying railroad right-of-way and then made a cyclic climb with a pedal turn. This pedal turn placed the helicopter in a down wind condition…
- [Accident 20020422011119A](https://openairdocs.org/incident/20020422011119A), Apr 22, 2002: Hiller UH12E (N3004T), Eugene, OR, No damage. (-23) Helicopter lost power while hovering at 100' AGL over trees. Pilot maneuvered to a clear area. Subsequent hard landing with substantial damage to landing…
- [Accident 20020211001129A](https://openairdocs.org/incident/20020211001129A), Feb 11, 2002: Hiller UH12E (N103HA), Miami, FL, No damage. (.19) On February 11, 2002, at 1706 central standard time, a Hiller UH-12E, N103HA, operated by slimline aviation inc., under the provisions of title 14 CFR…
- [Incident 20020113001579I](https://openairdocs.org/incident/20020113001579I), Jan 13, 2002: Hiller UH12E (N65048), Cleveland, TX, Minor damage. (-23) On 1645 CDT, 01/13/02, the pilot began a hover maneuver to reposition the helicopter on the pilot's property. During the time of the hovering movement of…
- [Accident 20010725038319A](https://openairdocs.org/incident/20010725038319A), Jul 25, 2001: Hiller UH12E (N67067), Hasting, NE, No damage. (-23) On July 25, 2001, at 1130 CDT, a Hiller UH-12E, N67067, piloted by arthur lee prescott sustained damage during an in-flight collision with terrain…
- [Accident 20010713016999A](https://openairdocs.org/incident/20010713016999A), Jul 13, 2001: Hiller UH12E (N9281P), Blythe, CA, Substantial damage. (.19) On July 13, 2001, at 0820 hours pacific daylight time, a Hiller UH-12E, N9281P, landed in soft soil and rolled onto its right side at Blythe, California.…

All 404: https://openairdocs.org/model/hiller-uh-12e/incidents.md

## Service difficulty reports (58, newest 50)

As reported by operators and repair stations, by the model named in the report.

- [SDR 2022FA0000286](https://openairdocs.org/sdr/2022FA0000286), Jun 10, 2022: HUB. CRACKED. A CRACK WAS FOUND ON THE OUTSIDE OF M/R HUB ORIGINATING FROM INBOARD TT PIN HOLE. THE CRACK EXTENDS FROM THE INSIDE DIAMETER OF THE BORE TO THE OUTSIDE OF THE H
- [SDR BHHR20190607001](https://openairdocs.org/sdr/BHHR20190607001), Apr 18, 2019: HOUSING. CRACKED. A CRACK WAS FOUND IN TRANSMISSION LOWER HOUSING JUST BELOW THE CYCLIC BELLCRANK BRACKET P/N 33031 MOUNTING FACE. THE CRACK WAS LOCATED IN THE AFT LOWER MOUNTING
- [SDR BHHR201710030002](https://openairdocs.org/sdr/BHHR201710030002), Oct 3, 2017: GEAR. SPALLED. ENGINE WAS REMOVED FROM SERVICE DUE TO CHIP LIGHTS AND AN AUDIBLE WHINE HEARD OVER THE RUNNING AIRCRAFT. THIS GEARBOX WAS ASSEMBLED IN-HOUSE AFTER A 3500 HOUR O
- [SDR BHHR201710030001](https://openairdocs.org/sdr/BHHR201710030001), Oct 3, 2017: DRIVE GEAR. SPALLED. A TEAR-DOWN INSPECTION OF A 250-C20B ENGINE GEARBOX WAS PERFORMED. THIS GEARBOX WAS REMOVED FROM SERVICE DUE TO CHIP LIGHTS AND AN AUDIBLE WHINE HEARD OVER THE 
- [SDR BHHR20170201001](https://openairdocs.org/sdr/BHHR20170201001), Feb 1, 2017: FORK. MISMANUFACTURED. DISCOVERED THE OUTBOARD TENSION TORSION PIN BORES ARE MISALIGNED. DISCOVERED BORES NOT BEING CONCENTRIC BY MANUFACTURING A WORKAID THAT FIT INTO OUTBOARD TT PIN
- [SDR 2015FA0000448](https://openairdocs.org/sdr/2015FA0000448), Sep 11, 2015: FORK. CRACKED. AFTER DETERMINING WHAT MAY HAVE CAUSED SN 11513P TO CRACK, WE CHECKED WHICH WAS UNDERGOING MAINTENANCE. WE FOUND SN 11527P TO HAVE A 1" LONG CRACK IN THE SAME P
- [SDR CA120605011](https://openairdocs.org/sdr/CA120605011), May 29, 2012: CROSSTUBE. BROKEN. (CAN) FWD CROSSTUBE WAS FOUND BROKEN AT THE LT SIDE INBD BOLT HOLE UPON INSPECTION AFTER BEING TRAILERED TO A JOB SITE.
- [SDR CA100824006](https://openairdocs.org/sdr/CA100824006), Aug 24, 2010: PIN. BROKEN. TENSION TORSION PIN BROKE OFF AT MAIN ROTOR HEAD WHERE DRAG BRACE ATTACHES TO PIN. ACFT WAS IN CRUISE FLIGHT PERFORMING AERIAL SPRAY APPLICATION. ACFT STARTED T
- [SDR 2010FA0000071](https://openairdocs.org/sdr/2010FA0000071), Jan 25, 2010: FORK. DAMAGED. FOUND DURING AN INCOMING INSPECTION THE FOLLOWING DEFECTS ON 4EA NEW FAA PMA PARTS SN 11566P/11567P/ 11568P & 11569P AS FOLLOWS; EDGE RADIUS OF ALL FORK BLADE P
- [SDR 2009FA0000332](https://openairdocs.org/sdr/2009FA0000332), Apr 24, 2009: HUB. CRACKED. MAIN ROTOR HUB PN 51437-11 SN 20074 SHOWED SIGNS OF POSSIBLE CRACK DURING PREFLIGHT, PERFORMED DYE PENETRANT INSP, AS PRECAUTIONARY MEASURE, CRACK INDICATION PR
- [SDR CA090220003](https://openairdocs.org/sdr/CA090220003), Feb 20, 2009: SPAR. CRACKED. (CAN) DURING INSP IAW AWD 97-10-16 (A) CONTROL ROTOR PN 36209-3, SN 449. FOUND CRACKED AT LOWER BOLT HOLE .600 FROM END OF SPAR.
- [SDR 2009FA0000580](https://openairdocs.org/sdr/2009FA0000580), Nov 4, 2008: BLADE. SEPARATED. DURING CRUISE FLIGHT, 1 OR 2 CONTROL ROTOR BLADE ASSEMBLIES SEPARATED FROM ROTOR HEAD. ROTOR CONTROL BLADE ASSY TUBE BROKE OTBD OF 2 BOLTS ATTACHING IT TO CUFF 
- [SDR 2008FA0000372](https://openairdocs.org/sdr/2008FA0000372), May 14, 2008: RETAINER. MISMANUFACTURED. RETAINER SUSPECTED LOCALLY MADE INSTALLATION WORD "UP" IS NOT STAMPED ON PART BUT ETCHED ON BY HAND. THICKNESS OF RETAINER IS .045, ACTUAL PART THICKNESS OF NEW
- [SDR CA080314019](https://openairdocs.org/sdr/CA080314019), Mar 4, 2008: BEARING. FAILED. (CAN) CHIP LIGHTS METAL CONTAMINATION ENGINE SHOP DETERMINED NR 5 BEARING FAILURE. (TC NR 20080314019)
- [SDR 2006FA0000900](https://openairdocs.org/sdr/2006FA0000900), Sep 1, 2006: CABLE. BROKEN. LT TAIL ROTOR CABLE FAILED. OPERATOR OPERATES IN VERY DUSTY ENVIRONMENT. BUILD UP OF DUST AND OILY SUBSTANCE FROM PRODUCT FOR SPRAYING CAUSE A FINE ABRASIVE SUB
- [SDR 2006FA0000427](https://openairdocs.org/sdr/2006FA0000427), Apr 12, 2006: HUB. CRACKED. M/R HUB DYE CHECK INSPECTION. HUB WAS FOUND TO BE CRACKED. RETIREMENT LIFE, 2500 HOURS. (K)
- [SDR 2005FA0000824](https://openairdocs.org/sdr/2005FA0000824), Jun 6, 2005: MAST. CRACKED. HELICOPTER EXPERIENCED A PROGRESSIVE LATRIAL VIBRATION. SUBSEQUENT INSPECTION FOUND 2 CRACKS FROM THE PITCH PIN SLOT AREA OF THE MAST. ONE CRACK FROM THE TOP OF
- [SDR AUS20030449](https://openairdocs.org/sdr/AUS20030449), Apr 9, 2003: CONTROL CABLE. FAILED. (AUS) TAIL ROTOR CONTROL CABLE FAILED. CABLE RUNS FROM RT PEDAL TO FIREWALL LOCATED BEHIND THE PILOT SEAT. CABLE HAD BEEN SUBJECTEDTO HEAT SOURCE, POSSIBLY CONT
- [SDR AUS20020789](https://openairdocs.org/sdr/AUS20020789), Jun 14, 2002: SCREW. FAILED. (AUS) ENGINE ACCESSORY DRIVE GEAR PNO 67609 TO STARTER DRIVE GEAR PNO 67583 ATTACHMENT STUDS (6OFF) PNO STD-2208 AND DOWELS (3OFF) PNO72139 SHEARED.
- [SDR AUS20010648](https://openairdocs.org/sdr/AUS20010648), May 31, 2001: GEAR. FAILED. (AUS) ENGINE DRIVE GEAR PNO 67583 HAD SHEARED ALL THE BOLTS ATTACHING IT TO ACCESSORY DRIVE PNO 67609.
- [SDR 20010531CW001](https://openairdocs.org/sdr/20010531CW001), May 7, 2001: BLADE. DELAMINATED. DOUBLER DELAMINATION NO SIGNS OF CORROSION OR IMPACT WHICH MIGHT CAUSE DELAMINATION. CAUSE UNKNOWN
- [SDR AU001151](https://openairdocs.org/sdr/AU001151), Dec 5, 2000: HUB. CRACKED. (AUS) MAIN ROTOR HUB SEVERELY CRACKED IN AN AREA NOT KNOWN FOR CRACKING. FOLLOWING TAKEOFF CONTROL WAS ALMOST IMPOSSIBLE AND THE MASSIVE VIBRATION CAUSED THE FO
- [SDR 20001113SH006](https://openairdocs.org/sdr/20001113SH006), Oct 27, 2000: HUB. CRACKED. PRIOR TO THE INSTALLATION OF MAIN ROTOR HEAD ASSY, SN 493, AD 73-20-03 WAS ACCOMPLISHED. THE MAIN ROTOR HUB, SN 493, WAS FOUND CRACKED INSIDE THE HUB IN THE ARE
- [SDR AU000500](https://openairdocs.org/sdr/AU000500), Jun 21, 2000: CUFF. CRACKED. (AUS) MAIN ROTOR CUFF CRACKED FROM BOLT HOLE. CRACK LENGTH 10MM (0.393IN). FOUND DURING DYE PENETRANT INSPECTION IAW AD/HIL12/17(SB 36-1).
- [SDR 20000601SH010](https://openairdocs.org/sdr/20000601SH010), May 17, 2000: BLADE. DELAMINATED. BLADE WAS RETURNED TO BLADE SHOP FOR REPAIR OF SKIN TO TRAILING EDGE DISBOND. UPON INSPECTION, APPEARS THAT CLEANING AND/OR METAL PREP PROCESS FAILED CAUSING SK
- [SDR 99ZZZX4550](https://openairdocs.org/sdr/99ZZZX4550), Nov 10, 1999: CUFF. FAILED. CONTROL ROTOR CUFF SPLIT IN TWO AT THE INBOARD BOLT HOLE. OUTBOARD SECTION AND CONTROL ROTOR TUBE ASSEMBLY SEPARATED FROM HELICOPTER CAUSING LOSS OF CONTROL. CR
- [SDR CA991103012](https://openairdocs.org/sdr/CA991103012), Sep 21, 1999: OIL PUMP. SEIZED. (CAN) TRANSMISSION OIL PUMP HAD FAILED, FAILING TO LUBRICATE THE LOWER MAIN ROTOR TRANSMISSION RGB CAUSING IT TO SEIZE. TEAR DOWN TO FOLLOW.
- [SDR 99ZZZX211](https://openairdocs.org/sdr/99ZZZX211), Oct 27, 1998: MOUNT. SEPARATED. RUBBER MOUNT SEPARATION FROM MOUNTING FLANGE. RUBBER CURE DATE 11-95, MFG BY LORD. PART HAS BEEN IN SERVICE 12 MONTHS.
- [SDR 98ZZZX3262](https://openairdocs.org/sdr/98ZZZX3262), Jul 10, 1998: TERMINAL. CRACKED. DURING OVERHAUL NDT INSPECTION, FOUND CRACKED TERMINAL BORE. CRACK ABOUT .100 INCH INTO THE BORE AND ACROSS THE CLEVIS FACE. REF: CHI WO C7289. WORKSHEET 7-2-98
- [SDR 98ZZZX3261](https://openairdocs.org/sdr/98ZZZX3261), Jul 10, 1998: HUB. CRACKED. DURING OVERHAUL NDT INSPECTION, FOUND THE 4 CRACKS FROM THE T.T. PIN BORES.
- [SDR CA980507004](https://openairdocs.org/sdr/CA980507004), Apr 25, 1998: DAMPER ARM. FRACTURED. (CAN) A COMPLETE FRACTURE OCCURRED CAUSING THE ARM TO FAIL IN 2 PIECES. THE DAMPER ARM HOLDS A VIBRATION ABSORBING WEIGHT TO A FLIGHT CONTROL. THE FAILURE OF TH
- [SDR AU971422](https://openairdocs.org/sdr/AU971422), Nov 7, 1997: PIN. CRACKED. (AUS) MAIN ROTOR HEAD TENSION/TORSION PIN CRACKED.
- [SDR 97ZZZX3544](https://openairdocs.org/sdr/97ZZZX3544), Jul 19, 1997: BEARING. MISMANUFACTURED. NEW REPLACEMENT BEARING RECEIVED WITH INSTRUCTIONS FROM MRC (BEARING MFG), AND HILLER SL UH12-25-1 DESCRIBING INSTALLATION INSTRUCTIONS WITH REGARDS TO THE FILI
- [SDR AU970991](https://openairdocs.org/sdr/AU970991), Jun 14, 1997: GEAR. DAMAGED. (AUS) MAIN ROTOR TRANSMISSION UPPER PLANETARY RING GEAR TOOTH CHIPPED - MINOR DAMAGE TO ONE UPPER PLANETARY GEAR
- [SDR CA970716002](https://openairdocs.org/sdr/CA970716002), Jun 12, 1997: BOLT. SHEARED. (CAN) ENGINE FAILED IN FLIGHT. ON DISASSEMBLY IT WAS FOUND THAT THE CAMSHAFT GEAR SCREWS HAD SHEARED EXCEPT FOR ONE THAT WAS STILL INTACT, BUT LYING IN THE OIL 
- [SDR CHI1789](https://openairdocs.org/sdr/CHI1789), May 20, 1997: SHAFT SPLINE. CRACKED. UPPER AND LOWER TRANSMISSION COUPLING SPLINE SHAFT HAS ONE SPLINE CRACKED NEAR OUTER END OF SPLINE. REPLACED CRACKED SHAFT WITH SERVICEABLE UNIT. (X)
- [SDR 97ZZZX2037](https://openairdocs.org/sdr/97ZZZX2037), Apr 24, 1997: PISTON PIN. DEFECTIVE. AD 97-01-03 AND LYC SB 527B DO NOT REFERENCE VO540 ENGINES IN MODELS AFFECTED, BUT 4 OF 6 PISTON PINS IN ENGINE HAD TO BE REPLACED IN C/W THE SB REQUIRED ACTION
- [SDR 97ZZZX2838](https://openairdocs.org/sdr/97ZZZX2838), Apr 7, 1997: INTAKE VALVE. WORN. THE VALVE STEM UNDER THE KEEPER'S WAS HEAVILY WORN. THIS CONDITION WAS ALSO FOUND ON 4 OTHER VALVES (INTAKE) ALL HAVING THE SAME TOTAL TIME AND PART NUMBER. THE
- [SDR 97ZZZX1825](https://openairdocs.org/sdr/97ZZZX1825), Apr 7, 1997: VALVE. FAILED. THE HELICOPTER WAS RUNNING ROUGH SO A COMPRESSION CHECK WAS RUN. THE NR 2 CYLINDER HELD NO COMPRESSION AND WAS REMOVED FOR INSPECTION. NOTED A .1250 INCH BY .25
- [SDR 97ZZZX1680](https://openairdocs.org/sdr/97ZZZX1680), Mar 26, 1997: CUFF. CRACKED. IAW AD 77-07-05(S) AND HILLER SB 36-1 REV 3, PARA 2(G). FOUND CRACK AT CONTROL BLADE CUFF INBOARD BOLT HOLE DURING 100-HOUR REPETATIVE DYE-PENETRANT INSPECTION.
- [SDR 97ZZZX1679](https://openairdocs.org/sdr/97ZZZX1679), Mar 26, 1997: CUFF. CRACKED. IAW AD 77-07-05(S) AND HILLER SB 36-1 REV 3, PARA 2(G). FOUND CRACK AT CONTROL BLADE CUFF INBOARD BOLT HOLE DURING 100-HOUR REPETATIVE DYE-PENETRANT INSPECTION.
- [SDR AU970349](https://openairdocs.org/sdr/AU970349), Mar 23, 1997: STUD. BROKEN. (AUS) NO2 CYLINDER HOLD DOWN STUDS BROKEN - INVESTIGATION FOUND SIX CYLINDER BASE NUTS MISSING, THIRTY NUTS LOOSE AND ONLY TWELVE NUTS TO BE TIGHT - CRANKCASE P
- [SDR 97ZZZX1133](https://openairdocs.org/sdr/97ZZZX1133), Feb 25, 1997: CYLINDER. NOT TO SPEC. DURING ASSEMBLY OF ENGINE, MEASURED DRY TAPPET CLEARANCE FROM .107 INCH TO .187 INCH. LYC OHM REQUIRES .028 INCH TO .080 INCH. RETURNED 6 CYLINDERS TO EC/SW WHE
- [SDR 97ZZZX95](https://openairdocs.org/sdr/97ZZZX95), Nov 27, 1996: DRIVESHAFT. CRACKED. DURING POST-FLIGHT INSPECTION, PILOT FOUND 1 INCH CRACKS EMANATING FROM RIVETS THAT ATTACH BALANCE WEIGHTS TO INTERIOR TO DRIVESHAFT. SUBMITTER RECOMMENDS THIS 
- [SDR 96ZZZX5942](https://openairdocs.org/sdr/96ZZZX5942), Nov 13, 1996: HUB. CRACKED. CRACK FOUND INSIDE CONICAL SURFACE DURING PRE-FLIGHT INSPECTION. CRACKING IN THIS AREA IS COMMON.
- [SDR 96ZZZX5941](https://openairdocs.org/sdr/96ZZZX5941), Nov 9, 1996: BOLT. FAILED. IN CLIMB-OUT FROM LOG LANDING WITH EXT LOAD AT AN ALT OF APPROX 400 FEET AND 69.5 PSI TORQ, PILOT HEARD A 'BANG' FOLLOWED BY A HIGH FREQ VIBR. AFTER CHECKING AL
- [SDR 96ZZZX5940](https://openairdocs.org/sdr/96ZZZX5940), Nov 9, 1996: BOLT. FAILED. IN CLIMB-OUT FROM LOG LANDING WITH EXT LOAD AT AN ALT OF APPROX 400 FEET AND 69.5 PSI TORQ, PILOT HEARD A 'BANG' FOLLOWED BY A HIGH FREQ VIBR. AFTER CHECKING AL
- [SDR 96ZZZX5154](https://openairdocs.org/sdr/96ZZZX5154), Sep 12, 1996: BALLAST WEIGHT. DISLODGED. ON SEPTEMBER 12, 1996, A HILLER MODEL UH-12 ET OPERATED BY SUMMIT HELICOPTERS CRASHED, COMPLETELY DESTROYING THE HELICOPTER AND SERIOUSLY INJURING THE PILOT. TH
- [SDR AU960746](https://openairdocs.org/sdr/AU960746), May 26, 1996: CONTROL ROTOR. CRACKED. (AUS) MAIN ROTOR HEAD CONTROL ROTOR CRACKED AT SPAR END THROUGH THE FIRST BOLT HOLE FOR APPROXIMATELY 50% OF CIRCUMFERENCE - FOUND DURING INSPECTION IAW AD/HIL1
- [SDR 96ZZZX2945](https://openairdocs.org/sdr/96ZZZX2945), May 15, 1996: HUB. CRACKED. HUB FOUND CRACKED INSIDE HUB AT CONTROL ROTOR TRUNNION STUD HOLE. CRACK FOUND AT 50-HOUR DYE PENETRANT INSPECTION DURING C/W AD 73-20-3. SUBMITTER STATED CRACKS

All 58: https://openairdocs.org/model/hiller-uh-12e/reports.md

## STCs that may be installed (OpenAirDocs) (74, first 50)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SR04637CH](https://openairdocs.org/stc/SR04637CH): Replacement of existing main ship battery with Lithium Ion Battery and installation of Annunciator Control Panel. Airwolf Aerospace LLC
- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [STC SH1152NW](https://openairdocs.org/stc/SH1152NW): Installation of the Automatic Flagman Model 135 Control Stick Grip. Air Products & Parts LLC
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies
- [STC SR01845SE](https://openairdocs.org/stc/SR01845SE): Installation of a barrier air filtration system. Cascade Flying Service LLC
- [STC SR00420NY](https://openairdocs.org/stc/SR00420NY): Installation of Airwolf remote mounted engine oil filter Model AFC-600. Airwolf Filter, Corp
- [STC SR01802WI](https://openairdocs.org/stc/SR01802WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel per ASTM D7547. Swift Fuels LLC
- [STC SR02394AK](https://openairdocs.org/stc/SR02394AK): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system. Seaplanes North LLC
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SH381NW](https://openairdocs.org/stc/SH381NW): Installation and maintenance of engine auto reignition system. (UH-12E modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH476NW](https://openairdocs.org/stc/SH476NW): Installation of an agricultural spray system. Siam Hiller Holdings Inc
- [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC
- [STC SH178WE](https://openairdocs.org/stc/SH178WE): Installation of Allison 250-C20/250-C20B engine and related changes. (UH-12E-L (4 place)). Siam Hiller Holdings Inc
- [STC SH248NW](https://openairdocs.org/stc/SH248NW): Installation and maintenance of exhaust ejector engine oil cooler system. (UH-12E modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH288NW](https://openairdocs.org/stc/SH288NW): Installation of Hiller landing gear float kit No. 44012. (UH-12E modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH296NW](https://openairdocs.org/stc/SH296NW): Installation of Hiller auxiliary fuel tanks kit No. 72041. (UH-12E modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH298NW](https://openairdocs.org/stc/SH298NW): Installation and maintenance of a cabin heater system. (UH-12E modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH300NW](https://openairdocs.org/stc/SH300NW): Installation of Soloy cargo racks. Siam Hiller Holdings Inc
- [STC SH322NW](https://openairdocs.org/stc/SH322NW): Installation of a Bendix fuel control/power governor system on the Allison 250-C20 turbine powered Hiller UH-12E rotorcraft. (UH-12E modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH339NW](https://openairdocs.org/stc/SH339NW): Installation of transmission oil cooling system on the Allison250-C20 turbine powered Hiller UH-12E rotorcraft. (UH-12E modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH506NW](https://openairdocs.org/stc/SH506NW): Installation of cargo release pedal. Siam Hiller Holdings Inc
- [STC SH560NW](https://openairdocs.org/stc/SH560NW): Installation and maintenance of engine inlet air cleaner system. Siam Hiller Holdings Inc
- [STC SH634NW](https://openairdocs.org/stc/SH634NW): Installation of Tundra Pads. Siam Hiller Holdings Inc
- [STC SA01258SE](https://openairdocs.org/stc/SA01258SE): Installation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML. R-S Sales Inc
- [STC SA02520AT](https://openairdocs.org/stc/SA02520AT): Installation of M-20 Oil Separator, model 600-WP. M-20 Oil Separators LLC
- [STC SH849NW](https://openairdocs.org/stc/SH849NW): Installation of North American Industries, Inc., Model No. 5 Automatic Flagman. R-S Sales Inc
- [STC SH201WE](https://openairdocs.org/stc/SH201WE): Installation of stirrup assemblies to directional control pedals for operation by handicapped pilot. (US ARMY OH-13E 205A). Dallwig Barry C
- [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc
- [STC SH12CE](https://openairdocs.org/stc/SH12CE): Replace existing engine induction air filter with AC Spark Plug Filter. Brackett Aero Filters Inc
- [STC SH767NW](https://openairdocs.org/stc/SH767NW): Installation of Chadwick Model C-512S spray system. Tower Aerospace, Inc
- [STC SR00135LA](https://openairdocs.org/stc/SR00135LA): Installation of Yehnert Tail Rotor Blades YH-278 as replacements for Hiller Tail Rotor Blades 55073. Yehnert Helicopters, Inc
- [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC SH5729NM](https://openairdocs.org/stc/SH5729NM): Full flow oil filter system. Grogan Don
- [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International
- [STC SH300GL](https://openairdocs.org/stc/SH300GL): Installation of Facet Enterprises engine lubrication system scavenge filter. Facet Filter Products
- [STC SH2763SO](https://openairdocs.org/stc/SH2763SO): Installation of control rotor safety cable. JAARS Inc
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SH2611SO](https://openairdocs.org/stc/SH2611SO): Installation of cargo rack. JAARS Inc
- [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International
- [STC SH4173NM](https://openairdocs.org/stc/SH4173NM): Installation of Simplex Model 7600 modular electrical system. (US ARMY OH-13E M74A). Simplex Manufacturing Company
- [STC SH3362NM](https://openairdocs.org/stc/SH3362NM): Installation of a Tail Rotor Blade Protective Coating. Columbia Helicopters Inc
- [STC SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International
- [STC SH4997SW](https://openairdocs.org/stc/SH4997SW): Installation of Lycoming TIVO-540-A2A engine. Craig Helicopters
- [STC SH302NM](https://openairdocs.org/stc/SH302NM): Installation of two Albany Int. dispersion pads, Drawing No. 21940 or 21961. Albany International
- [STC SH1014NW](https://openairdocs.org/stc/SH1014NW): Simplex Model 4600 spray system. Simplex Manufacturing Co
- [STC SH1147NW](https://openairdocs.org/stc/SH1147NW): Installation of a Chadwick Spray System. Helicopter Maintenance Corp
- [STC SH887NW](https://openairdocs.org/stc/SH887NW): Simplex Model 4650 spray system - agricultural. Simplex Manufacturing Co
- [STC SH948NW](https://openairdocs.org/stc/SH948NW): Installation of Model No. 5 automatic flagman. (UH-12E Restricted). North American Industries

All 74: https://openairdocs.org/model/hiller-uh-12e/stcs.md

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Hiller-Rogerson Helicopter UH12E](https://openairdocs.org/model/hiller-rogerson-helicopter-uh12e): 1 registered aircraft, registry code 4361101
- [Hiller-Fisher UH-12E](https://openairdocs.org/model/hiller-fisher-uh-12e): 0 registered aircraft, registry code 4360601
- [Hiller-Miller UH-12E](https://openairdocs.org/model/hiller-miller-uh-12e): 0 registered aircraft, registry code 4361201
- [Rogerson Hiller UH-12E](https://openairdocs.org/model/rogerson-hiller-uh-12e): 0 registered aircraft, registry code 4366001

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